All three of the Reinhard camps used carbon monoxide, pumped into sealed
rooms, to do their killing.

Carbon monoxide worked slower than
Zyklon B, but it worked well
enough for Himmler to proceed. While he was ... in Lublin, he
sent a written order to Krüger: the "resettlement" of the
entire Jewish population of the Government General was to be
completed by December 31, 1942. With the exception of a few
collection camps for Jews in some major cities, no Jews were to
remain in Poland. All Jewish laborers had to complete their jobs
or be transferred to one of the collection camps. These measures
were prerequisites for the Nazi "new order" in Europe, since any
remaining Jews would stimulate resistance and provide a source
of moral and physical pestilence. (Himmler to Krüger, 19 July
1942, NA RG 238, NO-5574, quoted by Arad, Belzec, 47)(Breitman,
238)

Those who deny the Holocaust have claimed that fumes from a diesel
engine are not toxic enough to kill people. (This claim is made with
regard to the death camp of
Treblinka - see Section 4.1.3 for the
rulings from the German
Treblinka trials. In other death camps,
gasoline engines were used. The method of killing was simple -
people were crammed into the gas chambers, and the exhaust of
powerful engines was pumped into them).

In a closed chamber, of course diesel fumes will kill. There was
actually a study on this in the British Journal of Industrial
Medicine (Prattle, 47-55.) The researchers ran a few experiments in which various animals were exposed to diesel fumes, and studied the results.

In the experiments, the exhaust of a small diesel engine (568 cc, 6
BHP) was connected to a chamber 10 cubic meters (340 cubic feet) in
volume, and the animals were put inside it. In all cases, the
animals died. Death was swifter when the intake of air to the engine
was restricted, as this causes a large increase in the amount of
carbon monoxide (CO) that is emitted. (See, for instance, Diesel
Engine Reference Book, by Lilly, 1985, p. 18/8, where it is stated
that at a high air/fuel ratio the concentration of CO is only a few
parts per million but for lower ratios (25:1) the concentration of CO
can rise up to 3,000 ppm. It is very easy to restrict the air intake
- the British researchers did so by partially covering the air intake
opening with a piece of metal.)

Even in cases where the CO output was low, the animals still died
from other toxic components - mainly, irritants and nitrogen dioxide.

Now, the diesel engines used in Treblinka were much larger - they
belonged to captured Soviet T-34 tanks. These tanks weighed 26-31
tons (depending on the model) and had a 500 BHP engine (compared to a
mere 6 BHP in the British experiments). The volume of the
extermination chambers in Treblinka is, of course, a factor. But the
chambers' volume is about 60 cubic meters (2040 cubic feet); this is
6 times more than those in the British experiments, but the difference
in the size of the engines is much larger than a factor of 6.

It should be remembered that what matters in CO poisoning is not the
concentration of CO, but the ratio of CO to oxygen. In a small,
gas-tight room, crammed full of people, oxygen levels drop quickly,
thus making death by CO poisoning faster. As noted, other toxic
components in the fumes further accelerate mortality.

The SS was aware of the fact that cramming as many people as possible
into the gas chamber, thus leaving no empty spaces, would accelerate
mortality. This is evident, for instance, from a
letter regarding
"gassing vans" (used in the
Chelmno extermination camp and other
locations) sent to SS-Obersturmbannführer Walter Rauff, 5 June 1942.
(Rauff was in charge of the Technical Department of the Reich Security
Main Office, and was responsible for developing the
mobile gas vans
used by the Einsatzgruppen) The letter is quite long, but here is the
relevant part:

2) The vans are normally loaded with 9-10 people per square meter.
With the large Saurer special vans this is not possible because
although they do not become overloaded their maneuverability is
much impaired. A reduction in the load area appears desirable.
It can be achieved by reducing the size of the van by c. 1 meter.
The difficulty referred to cannot be overcome by reducing the size
of the load. For a reduction in the numbers will necessitate a
longer period of operation because the free spaces will have to be
filled with CO. By contrast, a smaller load area which is
completely full requires a much shorter period of operation since
there are no free spaces. (Just. Get
pub/people/r/rauff.walter/rauff.letter.060542)

On July 22 ...deportations began from the Warsaw ghetto to ...
[
Treblinka]. The same day, Globocnik wrote to Karl Wolff: "The
Reich Führer SS ... has given us so much new work that with it
now all our most secret wishes are to be fulfilled. I am so
very thankful to him for this, and he can be sure of one thing,
that these things he wishes will be fulfilled in the shortest
time." (On the start of deportations to Treblinka, Arad, Belzec,
60-61, 392. Quote from Globocnik to Wolff, 22 July 1942,
Globocnik SS file, Berlin Document Center.) (Breitman, 238)

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